Derm: Pityriasis versicolor: Free MSRA Podcast

✅ MSRA Deep Dive: Pityriasis Versicolor – Discolouration, Diagnosis & ManagementIn this episode, we’re zooming in on Pityriasis Versicolor (aka Tinea Versicolor), a common superficial fungal skin infection. Caused by Malassezia yeast, this condition is MSRA-relevant due to its subtle signs, confusing differentials, and high recurrence. We break down what you need to know, fast.🧠 Key Learning Points📌 Definition & Organism• A yeast-driven skin infection caused primarily by Malassezia furfur• Not a true “tinea” – it's a yeast, not a dermatophyte📌 Pathophysiology• Malassezia overgrows on oily, sweaty skin• Produces azelaic acid → inhibits tyrosinase → blocks melanin production• Leads to hypopigmented, pink, or brown scaly patches📌 Risk Factors• Hot, humid climates, excessive sweating, oily skin• Adolescents/young adults, immunosuppression, tight clothing• More common in tropical regions, up to 40% prevalence🔍 Clinical Features• Flat discoloured patches (white, brown, pink) on the trunk, neck, upper arms• Fine scale, minimal itch• Becomes more visible after sun exposure• Often recurrent🧠 Differential DiagnosesPityriasis Versicolor vs:• Vitiligo – no scale, total pigment loss• Pityriasis alba – facial hypopigmentation in kids• Tinea corporis – ring-shaped, raised edge• Seborrhoeic dermatitis – red, greasy scales on face/scalp• Pityriasis rosea, guttate psoriasis, mycosis fungoides, secondary syphilis✅ Key clues: fine scale, lack of inflammation/itch, oily/sweaty areas🧪 Investigations• Usually a clinical diagnosis• If unclear:• KOH microscopy – “spaghetti & meatballs” (short hyphae + round spores)• Woods lamp – yellow-green fluorescence• Fungal culture not helpful – Malassezia is normal flora💊 Management🎯 First-line: Topical Antifungals• Ketoconazole shampoo – apply daily for 1–4 weeks• Selenium sulphide, clotrimazole, or miconazole as alternatives🎯 Oral antifungals• Consider itraconazole for severe, recurrent, or widespread disease• Reserved for resistant or relapsing cases🎯 Prevention• Regular use of antifungal shampoo (e.g. monthly)• Avoid tight clothes, reduce sweat, improve hygiene• Education on recurrence risk📈 Prognosis• Excellent, but recurrence is common• Pigment takes time to return – weeks to months• Post-treatment pale areas ≠ active infection✅ Tip: If scaling has stopped, fungus is usually gone⚠️ Complications• Cosmetic distress from pigment changes• Rare permanent hypopigmentation if longstanding• No systemic spread; not harmful to overall health🩺 MSRA Scenario TipPatient: 17-year-old, post-summer, scaly pale patches on trunk→ Suspect Pityriasis Versicolor→ Treat with ketoconazole shampoo🎯 Diagnosis clue: Fine scale + location + tanning contrast📚 MSRA Revision Resources📝 Notes: https://www.passthemsra.com/topic/pityriasis-versicolor-revision-notes/💬 Flashcards: https://www.passthemsra.com/topic/pityriasis-versicolor-flashcards/🧠 Accordion Q&A: https://www.passthemsra.com/topic/pityriasis-versicolor-accordion-qa-notes/🧪 Rapid Quiz: https://www.passthemsra.com/topic/pityriasis-versicolor-rapid-quiz/🎯 Full Quiz: https://www.passthemsra.com/quizzes/pityriasis-versicolor/📘 Dermatology Course: https://www.passthemsra.com/courses/dermatology-for-the-msra/🏷️ Hashtags#MSRA #MSRARevision #Dermatology #PityriasisVersicolor #TineaVersicolor #Malassezia #SkinInfections #MSRAQuiz #PassTheMSRA #FreeMSRA #MSRAFlashcards